Breachesby GlyphYale New Haven Health
Disclosed Apr 11, 20255,556,702 affectedUnverified
Cyberattack on Yale New Haven Health exposes 5.5M patients
Connecticut's largest health system said a March 2025 cyberattack let hackers copy patient names, birth dates, contact details, race and ethnicity, Social Security numbers and medical record numbers; it reported 5,556,702 affected people to HHS.
What is known
| People affected | 5,556,702 (as reported by the organization) |
|---|---|
| Disclosed | Apr 11, 2025 |
| Discovered | Mar 8, 2025 |
| Attack | Hacking |
| Data exposed | NamesDates of birthAddressesEmailsPhone numbersSocial Security numbersHealthOther |
| Sector | Healthcare · US |
| Status | Unverified: not yet confirmed by an official notice, a filing or the organization |
| Lawsuit or fine | $18M class action settlement (2025) |
Sources
Notices filed
Other breaches at Yale New Haven Health
History of this record
First recordedby seedSource
First seen 2026-09-25 (Research). Record counts are as reported. Not legal advice.